marcom

Which of the following scenarios best demonstrates the critical need for visual

signaling under the International Code of Signals?

• A ship approaching a port in daylight using VHF for berthing

  instructions

• A vessel losing radar contact and switching to satellite navigation

• A vessel in radio silence transmitting "O" with Aldis lamp during a

  crew overboard emergency

• A ship requesting weather update from a coastal station using

  Navtex

A vessel uses a flashing light to send a signal. What key factor must be

maintained for the receiver to decode the signal accurately?

• Multiple colors

• Line-of-sight and timing consistency

• Repetition of the signal in 5-minute intervals

• Use of infrared wavelength

Which single-letter signal from ICS requires immediate cautionary maneuvering

due to a risk of collision?

• M

• Q

• U

• Y

Which Morse signal is most urgent and must be universally understood

regardless of language?

• Q

• U

• SOS

• ZULU

Which visual signaling method relies on body positioning and not lights or flags?

• Semaphore

• Flashlight Morse

• IRPCS Rule 27

• ICS Alphabetic Panels

A ship transmits "H" visually. What action should a nearby port authority

anticipate?

• Vessel expects assistance

• A diver will enter water

• Pilot is already onboard

• Vessel is in quarantine

In the context of IRPCS, visual signaling is preferred over VHF when:

• Transmitting meteorological data

• Conducting long-distance convoy

• Radios are malfunctioning or prohibited

• Performing anchoring drills

During a drill, a cadet flashes three long, three short, three long flashes. What

does this indicate?

• Man overboard

• Incorrect use of Morse

• Request for visual reply

• Distress signal error

A pilot boat notices signal “Q” from a vessel. What is the implication?

• Quarantine clearance requested

• Vessel is healthy and requests free pratique

• Hazardous goods on deck

• Man overboard, immediate assistance needed

An observer detects repeating flashes: • • • — — — • • •. What is the correct

protocol?

• Acknowledge and log the message

• Ignore unless repeated thrice

• Activate firefighting equipment

• Inform port authority immediately